CH713192A1 - Wheel wedge to block a stationary wheel. - Google Patents

Abstract

The invention relates to a wheel wedge for blocking a stationary wheel having a bottom surface (1) for resting on a floor and a wheel surface (2) for engagement with the wheel. The wheel surface (2) is provided for blocking the wheel angled to the bottom surface (1). The bottom surface (1) and the wheel surface (2) are connected to each other via a hinge and designed foldable. An arresting device is arranged movably on the bottom surface (1) and / or the wheel surface (2) and arrests the bottom surface (1) and the wheel surface (2) in a folded, angled state in a locking position.

Description

Description: The invention relates to a wheel wedge for blocking a standing wheel, which has a floor surface for resting on a floor and a wheel surface for bearing against the wheel, the wheel surface being provided at an angle to the wheel to block the floor surface.

To block the wheels of a vehicle or an aircraft, it is known to clamp a wedge between at least one of the wheels and the ground, so that the wheel is blocked and prevented from rolling. Such wedges are also called cycling shoes. There are different dimensions of wheel chocks, which are based on the area of application of the wheel chock, in particular on the size of the wheel that is to be blocked. Wheel wedges are often provided on opposite sides of a wheel and on several wheels for improved securing of the vehicle or aircraft.

The wheel chocks must withstand a large force when a force is transmitted from the vehicle or aircraft via the wheel to the wheel chock. They are therefore often heavy and bulky, so that they can only be transported and stowed to a limited extent. Especially if several wheel chocks are used to secure the vehicle or aircraft, the wheel chocks take up a lot of space when stowed.

[0004] DE 20 2008 008 588, for example, discloses a wheel wedge which is predominantly made of plastic. For reliable securing of the wedge, however, partial areas are made of metal, so that the weight advantage of the plastic is reduced. As usual, the wheel wedge is designed as a triangular block and therefore consumes a lot of storage space during storage.

It is an object of the present invention to provide a wheel wedge that allows a reliable locking of a wheel, takes up little space in storage, is easy to use and has a robust design.

This object is achieved by a wheel wedge according to claim 1. Advantageous refinements and different embodiments of the invention emerge from the subclaims.

A wheel wedge for blocking a stationary wheel according to the present invention comprises a floor surface for resting on a floor, e.g. a road, and a wheel surface for bearing against the wheel to be blocked. According to the invention, the wheel surface and floor surface are connected to one another via a hinge, so that the wheel wedge is designed to be foldable, ie. H. The wheel surface and floor surface can be folded together. In a position of use, the wheel wedge is unfolded and the wheel surface and floor surface are fixed at an angle to one another to block the wheel. In a folded position, the wheel surface and the base surface are folded together and are at least approximately parallel to one another.

According to the invention, a locking device on the bottom surface and / or the wheel surface is arranged such that it locks the bottom surface and the wheel surface in an unfolded, angled state in a locking position and releases the bottom surface and the wheel surface for folding in a folded position of the wheel wedge.

By folding the volume of the wheel wedge can be significantly reduced, so that its space requirement is reduced during storage. Furthermore, several wheel chocks can be stacked on top of each other in the flat folding position. When used to lock a wheel, the wheel wedges are securely fixed in their wedge shape by the locking device and offer a reliable locking of the wheel.

Wheel surface and bottom surface are preferably designed as rigid flat plates, so that they can come to rest on each other in the folded state. The wheel surface and floor surface are advantageously of identical design, so that the surfaces are identified only by their function. By simply turning the wheel wedge over, the floor and wheel surfaces are reversed. In principle, however, it is also possible for the plates to have a slight curvature. In particular with the wheel surface, the system on the wheel can be improved.

In one embodiment, the locking device has at least one support bracket which is articulated on the floor or wheel surface and supports the bottom surface and the wheel surface at an angle to one another in a locking position. The support beam can be supported on the opposite surface, e.g. on the wheel surface when the support beam is arranged on the bottom surface. Alternatively, the support beam can be supported on a surface of an additional component. To secure in the locking position, the support bracket can be releasably attached to the surface. For example, a stop or a plug or snap fixation can be provided.

In a further embodiment of the wheel wedge according to the invention, the locking device has a rigid locking surface and has at least one support bracket. The locking surface, as an additional component to the wheel and floor surface, can be designed, for example, in the form of a plate or a rod. The support bracket is articulated at one end on the locking surface and articulated at its other end on the bottom or wheel surface. In a folded position of the floor and wheel surfaces, the locking surface and preferably also the support bracket run at least approximately parallel to the floor and wheel surfaces. In the locking position, however, the locking surface, support bracket and floor or wheel surface are triangular, i.e. H. they open a wedge. It is emphasized that the locking surface is not attached directly to the wheel surface or the bottom surface, but is only connected via the support bracket. The support bracket serves as a swivel arm with which the locking surface is movable relative to the floor and wheel surfaces. The locking surface can be lifted off the wheel or floor surface and moved parallel to it at the same time. In addition, the support bracket is used for

Support the locking surface in a locking position. This improves the mobility of the wheel wedge and it can be folded up in a simple manner.

Advantageously, the locking surface in the locking position strikes at one end on a stop on the floor or wheel surface; preferably on the floor or wheel surface on which the support bracket is also movably mounted. The locking surface, support bracket and floor or wheel surface form a triangle. In the folded position, this end of the locking surface is removed from the stop and the wheel wedge can be folded up. For example, the hinge between the floor surface and the wheel surface forms the stop. This means that no additional structural measures are required to implement the stop.

In a preferred embodiment of a wheel wedge according to the present invention, two support beams are provided, each of which is supported at one end on opposite sides of a locking surface. A first support beam is supported with its other end on the bottom surface and a second support beam with its other end on the wheel surface. The arrangement thus forms a symmetrical, mirror-image geometry around the locking surface. As previously mentioned, the bottom surface and the wheel surface can advantageously be identical, so that they are interchangeable. The support beams have the same length, so that the locking surface is arranged centrally between the wheel and floor surfaces. Due to the articulated connection of the locking surface with the wheel surface and the bottom surface by means of the support brackets, the locking surface can be pulled out in the longitudinal direction to the wheel and bottom surface and pushed into it. The wheel and floor surface are stretched out like an umbrella or folded up. For clamping, the locking surface is pushed between the wheel and floor surfaces until it strikes the hinge. In this position, the wheel and bottom surfaces are locked in the unfolded state and the wheel wedge is ready for use to block a wheel.

In an advantageous embodiment of the wheel wedge, the geometry between the base surface, wheel surface and support beam is designed such that a load of a wheel that presses against the wheel surface presses the wheel wedge into its locking position. The wheel load basically acts in the direction of the normal of the wheel surface, i.e. H. perpendicular to the wheel surface. The lengths of the support beam, floor surface and wheel surface are thus designed such that the load force is deflected into a force which presses the support beam or the locking surface into the locking position, in particular pressing the locking surface against its stop. A force vector in the direction of the normal to the wheel surface thus forms an angle with the at least one support bracket such that the locking device is forced into a locking position.

In the embodiment described above with two symmetrically mounted on the locking surface support beams, an angle between the support beams and the locking surface greater than 90 ° is provided for this purpose. As a result, the force vector in the direction of the normal to the wheel surface is at least partially transformed into a thrust force which pushes the locking surface into the stop, in this case against the hinge between the wheel surface and the floor surface. The wheel load thus serves as an additional securing of the wheel wedge in its wedge position, so that an unwanted collapse is prevented.

In a variant of a wheel wedge according to the invention, at least the wheel surface and preferably also the bottom surface consist of aluminum. The entire wheel wedge is particularly preferably made of aluminum. Aluminum allows a light construction. Aluminum also allows static electricity from vehicles to be discharged to the ground. There is also no sparking if the wheel wedge rubs against the floor. Aluminum is also insensitive to dirt, such as oils, kerosene, deicing fluids, etc. that may be on the floor.

[0018] Alternatively, the wheel wedge can be made of a rustproof metal or a composite material. Stainless metals have the advantage that they are very robust and durable. Today's composite materials have sufficient rigidity to lock a wheel and also allow the wheel wedge to be lightweight.

In one embodiment, the wheel wedge advantageously has spikes made of hard metal on the bottom surface in order to prevent slipping on smooth or icy ground.

In yet another embodiment of the wheel wedge according to the invention, the locking surface can have a handle at its end opposite the stop end. The length of the locking surface is coordinated in such a way that the handle protrudes beyond the base surface and the wheel surface in the locking position and in the folding position. The handle for actuating the locking surface is thus accessible both in the folded state and in the opened state of the wheel wedge. With the handle, the locking surface in a simple manner from the locking position, d. H. be pulled away from the stop. Wedging can be solved quickly and the wheel chock can be stowed away. Conversely, the wheel wedge can be secured in the unfolded state by pushing the handle in the direction under the wheel. By pushing the handle, the locking surface is pushed against its stop.

In a further advantageous embodiment, the wheel wedge on the locking surface comprises a releasable securing connection which extends to secure the locking surface in the locking position from the locking surface in the direction of the stop. The securing connection is preferably designed as an elastic train connection, for example as a rubber band. The locking surface can be pressed against the stop using the tensile force of the tensioned safety connection. The securing connection can be attached to the wheel wedge itself, for example in the area of the stop or the hinge. The securing connection can advantageously also be attached to the wheel which is to be blocked by the wheel wedge.

Preferably, a pair of wheel wedges are provided, each wheel wedge being positioned on opposite sides of a wheel. In this case, the securing connection can extend from one wheel wedge to the opposite one and be fastened to it. The same securing connection can advantageously be used for both wheel wedges in that it extends from a locking surface of one wheel wedge to the locking surface of the opposite wheel wedge. As a result, both wheel chocks can be secured in their locking position at the same time and they can also be released from this securing at the same time.

The invention is illustrated below with reference to the figures, which are only intended to be illustrative and are not to be interpreted as restrictive. Features of the invention that will become apparent from the drawings are to be considered individually and in any combination as belonging to the disclosure of the invention. In the drawings:

1 is a three-dimensional representation of an embodiment of a wheel wedge according to the present invention in the unfolded state,

2 shows an exploded view of the wheel wedge from FIG. 1,

Fig. 3 is a side view of the wheel wedge from Fig. 1 and

Fig. 4 is an illustration of the wheel wedge from Fig. 1 in the folded state.

In Fig. 1, an embodiment of a foldable wheel wedge for blocking a stationary wheel according to the present invention is shown. The wheel wedge has a bottom surface 1 and a wheel surface 2, which are connected at one end by means of a hinge 3. With the hinge 3, the bottom surface 1 and the wheel surface 2 can be opened relative to one another. The hinge is designed such that the inner surfaces of the bottom surface 1 and the wheel surface 2 can come to lie on one another.

Furthermore, the wheel wedge has a locking device which is movably arranged on the bottom surface or the wheel surface. The locking device comprises a locking surface 4, a first support beam 5 and a second support beam

6. The support beams 5 and 6 are designed in this variant as rigid support plates. The first support beam 5 is pivotally mounted on the bottom surface 1 with a joint 7, specifically at the end opposite the hinge 3. In a symmetrical manner, the second support bracket 6 is pivotally mounted on the wheel surface 2 with a joint 8, again at the end opposite the hinge 3. At their ends opposite the joints 7 and 8, the first support beam 5 and the second support beam 6 are each mounted on the locking surface 4 via joints 9 and 10. The joints 9 and 10 are provided on opposite sides of the locking surface 4. A connection of the locking surface 4 with the bottom surface 1 or the wheel surface 2 is not provided.

By the support beams 5 and 6 and the joints 7, 8, 9 and 10, the movement of the locking surface 4 relative to the bottom surface 1 and wheel surface 2 is fixed. The locking surface 4 can be moved parallel to the base surface 1 and the wheel surface 2 and the support beams 5 and 6 can be pivoted relative thereto. A first end 11 of the locking surface 4 projects in the direction of the hinge 3 between the bottom surface 1 and the wheel surface 2. At the second, opposite end 12 of the locking surface 4, a handle 13 is provided with which the locking surface 4 moves manually relative to the bottom surface 1 and the wheel surface 2 can be.

In Fig. 1, the wheel wedge is shown in a locking position, in which the bottom surface 1 and the wheel surface 2 are locked in an unfolded, angled state. In this variant of the wheel wedge, the locking is achieved in that the first end 11 of the locking surface 4 abuts against the hinge 3, which connects the bottom surface 1 and the wheel surface 2. The hinge thus forms a stop 14 for the locking surface 4 on its inside between the base surface and the wheel surface. The rigid support beams 5 and 6 spread the base surface 1 and the wheel surface 2 apart at the opposite end 12 of the locking surface, so that a wedge shape is formed. The geometry of the wheel wedge is discussed in more detail in FIG. 3.

Fig. 2 shows a partial exploded view of the wheel wedge from Fig. 1 from which the individual components can be seen. The area of the wheel surface 2 is shown as an exploded view and the area of the bottom surface 1 is shown in the assembled state, as in FIG. 1.

Bottom surface 1 and wheel surface 2 are configured essentially identically. They are provided as rigid aluminum plates and have a corrugation on their sides provided as the outer surfaces of the wheel wedge. The corrugation supports a secure hold on the ground and on a wheel to be blocked. The hinge 3 is provided as a rod hinge with a rod 15. At one end of the bottom surface 1 and the wheel surface 2, hinge blocks 16a and 16b are provided with a bearing bushing, which serve as bearings for the rod 15. In the assembled state, the hinge blocks 16a and 16b engage between one another and the rod 15 runs through the bearing bushings of the hinge blocks 16a and 16b. The rod 15 is fixed in the hinge blocks 16a and 16b by means of fixing screws 17.

For the joints 7 and 8 joint blocks 18 are provided at the other end of the bottom surface 1 and the wheel surface 2, which cooperate with joint blocks 19 on the first support beam 5, or on the second support beam 6. The joint blocks 18 and 19 each have bushings. A rod 20 runs through the bearing bushings and connects the joint blocks 18 and 19, so that the joints 8 and 7 are formed. Furthermore, the support beams 5 and 6 have joint blocks 21 at their ends projecting towards the locking surface 4. The locking surface 4 has joint blocks 22 on both sides, which can engage between the joint blocks 21. The hinge blocks 21 and 22 in turn have bushings. The joint blocks 21 and 22 are connected by a rod 23, so that the joints 9 and 10 are formed. The rods 20 and 23 are in turn secured by fixing screws 17 in the joint bearings of the joint blocks.

In Fig. 3 the geometry of the wheel wedge is shown in a locking position in the unfolded state. A force vector F shows the action of force from a wheel on the wheel surface 2 of the wheel wedge. The force vector F acts in the direction of the normal to the wheel surface 2. It forms an angle with the support bracket 6 such that the locking surface 4 is forced into the locking position in which its end 11 abuts the stop 14. For this purpose, an angle α between the force vector F and the support beam 6 on the side of the locking surface end 11 is less than 180 °. The force of the force vector F generates a force component K in the support beam 6, which acts on the locking surface 4. The angle β between the support beam 6, or the force component K, and the locking surface 4 is greater than 90 °. The force component K is therefore transformed into a feed force V, which presses the locking surface 4 in the direction of the stop 14. The locking device of the wheel wedge is therefore secured in the locking position by loading the wheel surface 2. An analogous force curve is created between the bottom surface 1, the support beam 5 and the locking surface 4.

In the present embodiment, the bottom surface 1 and the wheel surface 2 have e.g. a length of 220 mm and the locking surface 4 a length of 234.8 mm. The angle α is 148 ° and the angle ß 99.5 °. However, these values are only examples; other angles below 180 ° for α and above 90 ° for β and other lengths are also possible.

4, the wheel wedge is shown in its folded position. The locking surface 4 is pulled out relative to the base surface 1 and the wheel surface 2, so that its end 11 is removed from the stop 14 on the hinge 3. The support beams 5 and 6 extend approximately parallel to the locking surface 4, the joints 7 and 8 resting on the locking surface 4. The bottom surface 1 and the wheel surface run at least approximately parallel to one another. The wheel chock is in a folded, flat state in which it can be easily stowed away and stored on other wheel chocks folded together.

It is emphasized that in addition to the embodiment shown in the figures, other configurations of the wheel wedge are possible with the features of the invention. For example, only one support bracket can be provided, which is mounted in the manner described between the floor or wheel surface and the locking surface. The other of the floor or wheel surface can then e.g. slide on the locking surface. The locking surface can also be moved between the floor and work surface and brought into contact with the hinge. However, the wedge angle in this embodiment is only half as large as in the embodiment shown. Furthermore, the stop does not have to be formed on the hinge. For example, edges can also be provided on the inside of the floor or wheel surface, which can serve as a stop for the end of the locking surface. It is conceivable to provide a series of edges so that an angle of the wheel wedge is variable, depending on which edge the locking surface is locked. Further variations of a wheel wedge according to the invention are conceivable.

Legend of Reference Numbers [0035]

floor area

wheel surface

hinge

Locking surface of first support bracket, second support bracket

joint

joint

joint

Articulation first end locking surface second end locking surface

Handle

attack

Rod

hinge blocks

fixing screws

joint blocks

joint blocks

Rod

joint blocks

joint blocks

Rod

K force component

V feed

F force vector

Claims (16)

claims 1. wheel wedge for blocking a standing wheel, which has a bottom surface (1) for resting on a floor and a wheel surface (2) for bearing against the wheel, the wheel surface (2) being provided at an angle to the locking of the wheel to the bottom surface (1) , characterized in that the bottom surface (1) and the wheel surface (2) are connected to one another via a hinge and are designed to be foldable, and in that a locking device is movably arranged on the bottom surface (1) and / or the wheel surface (2) which is in a locking position Bottom surface (1) and wheel surface (2) locked in an unfolded, angled state. 2. Wheel wedge according to claim 1, characterized in that the locking device has at least one support bracket (5) which is articulated on the floor or wheel surface (1; 2) and in a locking position the bottom surface (1) and the wheel surface (2) supported at an angle to each other. 3. Wheel wedge according to claim 1 or 2, characterized in that the locking device has a rigid locking surface (4) and at least one support bracket (5), wherein a support bracket (5) articulated at one end on the locking surface (4) and at the other end is articulated on the floor or wheel surface (1; 2) so that the locking surface (4) in a folding position is at least approximately parallel to the floor or wheel surface (1; 2) and in the locking position the locking surface (4), support bracket ( 5) and the floor or wheel surface (1; 2) are arranged triangularly. 4. Wheel wedge according to claim 3, characterized in that in the locking position the locking surface (4) with one end (11) on a stop (14) on the floor or wheel surface (1; 2) strikes and in the folded position this end ( 11) is removed from the stop (14). 5. wheel wedge according to claim 4, characterized in that the hinge (3) between the bottom surface (1) and wheel surface (2) forms the stop (14). 6. Wheel wedge according to one of claims 3 to 5, characterized in that two support beams (5, 6) are provided, each having one end on opposite sides of the locking surface (4), and a first support beam (5) with its the other end on the bottom surface (1) and a second support bracket (6) with its other end on the wheel surface (2). 7. Wheel wedge according to one of the preceding claims, characterized in that a force vector (F) in the direction of the normal of the wheel surface (2) with the at least one support bracket (6) encloses an angle such that the locking device is forced into a locking position. 8. wheel wedge according to claim 5 and 6, characterized in that in the locking position an angle between the support beams and the locking surface is greater than 90 °. 9. wheel wedge according to one of the preceding claims, characterized in that at least the wheel surface (2) consists of aluminum and preferably the entire wheel wedge consists of aluminum. 10. Wheel wedge according to one of the preceding claims, characterized in that the wheel wedge consists of a rustproof metal or a composite material. 11. Wheel wedge according to one of the preceding claims, characterized in that the wheel wedge on the bottom surface (1) has spikes, preferably spikes made of hard metal. 12. Wheel wedge according to one of the preceding claims, characterized in that the locking surface (4) at its end opposite the stop end (11) (12) has a handle (13) which in the locking position and in the folded position over the bottom surface (1 ) and the wheel surface (2) protrudes. 13. Wheel wedge according to one of the preceding claims, characterized in that the locking surface (4) comprises a releasable securing connection which extends from the locking surface (4) in the direction of the stop (14) in order to secure the locking surface in the locking position. 14. 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